Improvement in printing-presses



WATSO N.

I rinfing-Presses.

Patented Dec. 17

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*,UNITED STATES PATENT EEIOE.

JOSEPH WATSON, OF EvEEETT, MASSACHUSETTS.

IMPROVEMENT IN PRINTING-PRESSES.

Specification forming part of Letters PatentNo. 133,959, dated December 17, 1872.

- To all whom it may concern:

Be it known that I, JOSEPH WATSON, of

Everett, in the county of Middlesex and State of Massachusetts, have invented certain Improvements in Printing-Presses, of which the following is a specification:

My invention relates to the combination of lever, connecting-rods, and togglejoint with y the treadle.

Figure 1 is a top view, embracing my inven- V tion. Fig. 2 is an elevation of Fig. 1. Figs.

3 and 4 are transverse sections. p

' A3, the frame; B3, the bed; O3, the platen; D3, connecting-bars; E3, hand-lever; F3, treadle, J 3, toggle-joint; all of which require no further specitcation. g4 and i4 are arms, inserted in disk j. 7a4 is a Weight hung on arm This disk has a notch cut in its upper hvis a pawl, with notch fitting into notch in disk.

The within-described printing-press, be-

ing constructed as herein shown, with handlever, toggle joint, treadle, and connectingbars, its operation may be noted. The pa- -per to be printed is placed on the platen, and

rests on arm g4. (See Fig. 4.)

The above-named devices having been used separately in hand printing-presses, their dimensions and mechanical constructions being so well known, any mechanic Skilled in the art to which they appertain will be enabled to construct them, when combined as herein shown, without further Specification.

By pressing down the hand-lever with the righthand, and at the same time pressing down the treadle with the right foot, the platen approaches the bed with great force by the coinbined action of' hand-lever, toggle-joint, con necting-bars, and treadle, as will be observed without further specification. When the handlever and treadle are raised, the disk j4, moving with the platen, is held by catch h4, attached to fra-me, till the platen recedes some distance from the bed, when the paper drops below the platen. The notch in the disk slips from the notch in the pawl, and the weight on the arm causes the bar or arm g4 to rest on. the platen, assuming `position shown in Fig. 3. When the desired impression on the paper is attained 

